technical and economic potential for use of coal mine and ...nov 15, 2004 · advantage: • easy...

Technical And Economic Potential For Use Of Coal Mine And Abandoned Mine Methane G.A.S. Energietechnologie GmbH

COAL MINE GAS – Technical And Economic Potential G.A.S. Energietechnologie GmbH

Contents

Introduction

Utilisation of CMM /AMM

CHP Technology Solution &

Coal Mine Gas Classification & Potential

Operational Experience

Conclusion

Boilers, secondary fuels, gas-to-pipeline


Introduction of speaker

Name: Petro Sporer

Title: Managing Director

Qualification: graduate engineer


Contents

Introduction





Conclusion



Coal Mine Gas Classification

CBM Coal Bed Methane

AMM Abandoned Mine Methane

CMM l Mi

VCBM Virgin Coal Bed Methane

¾ High/moderate risk ¾ Wells & Fracs ¾ Oil & Gas Industry

Coal Mine Gas

VAM

¾ Coa ne Methane

Ventilation Air Methane

Developing technology ¾ Low risk ¾ Moderate risk ¾ High risk ¾ Pre-Post-drainage ¾ Shafts/wells ¾ Shafts ¾ Mining Industry ¾ Mining/other Industries ¾ Mining Industries


Worldwide potential of - Coal Mine Gas

Total 2010 MWel

2858

796

2811 VAM

AMM

Power Potential

CM M


Contents

Introduction





Conclusion



Utilization of CMM / AMM

Secondaryfuels

Gas-to-pipeline(High BTU gas > 80 % CH4)

Decentralized CHP Medium to low BTU gas (25 – 30 % CH4)

H2 CO

Boilersheat

electricity

MeOH


Contents

Introduction





Conclusion



Boilers

Use of coal mine gas for heating

• District heating (Poland, Eastern Europe)

• Internal use within the mining operations (heating/cooling of ventilation air, showers, etc)

• Electricity production via steam process


Secondary fuels MeOH

Use of coal mine gas to produce

• methanol • urea (fertilizer) • synthesis gas

→ high scales necessary → currently not adopted as an common utilization

option


Gas to pipeline

• High-grade CBM/CMM (> 96 % CH4) direct connected to pipelines

• Sub-quality gas (80 – 96 % CH4) has to be prepared by

- drying - nitrogen and carbon dioxide rejection - desulphurization - filtration

before it will be used in pipelines

• feasible economics in relation to the actual natural gas price


Example

Nitrogen Rejection Plant (NRU)Colorado, West Texas

built through DDC D'Amico Development in early 90s.


Contents

Introduction





Conclusion



CHP Technology Solution

Centralized approach:

Advantages: - large engine modules → lower specific invest

- centralized O & M

Disadvantages: - no flexibility → difficult capacity adjustments

- high investment in fixed assets (buildings, pipeline system)



Decentralized approach:

Advantage:

• easy adjustment of the plant capacity due to availability of coal mine gas.

• easy change of locations

• possibility of lease financing

• minimization of ¾ investment risks, ¾ space requirements, ¾ duration of project execution (< 6 Months)



Decentralized approach:

Disadvantage: ¾ higher specific costs

¾ decentralized O&M


Operational experiences

Out of 25 MW installed for CMM • CMM with a methane content down to 25 % CH4

can be used • Oversaturated gas due to utilization of

watering pumps

• dust (coal, rock, calcium anhydrite) → higher ware of the equipment

¾shorter equipment life ¾high costly maintenance efforts

→gas treatment necessary

• availabilities up to 95 % are achieved


Operational experiences

Out of 85 MW installed for AMM

• availabilities of up to 98 % are achieved. • decline of CH4 concentrations and increase of sucking

pressures over the time

• air ingress and climbing water levels might occur• higher risk of gas availability →portfolio of mobile equipment

• dust; sulfur and water might be a problem on certain locations → higher wear of the equipment

→gas treatment necessary


Examples of Mobil Coal Mine Gas CHP for AMM

project Kurl 3

location Lünen, Germany

fuel coal mine gas

commissioning 2002

el. performance 4.074 kWel

th. performance - kWth

energy for appr. 10.000 households/a

emission reductions of approx. 130.000 t/a

CO2-equivalents

Examples of Mobile Coal Mine Gas

project

location Bochum, Germany

fuel coal mine gas

commissioning 2003/2004

el. performance el

energy for households/a

reductions of approx. 520.000 t/a CO2-equivalents


CHP Plants for CMM

Haus Aden

16.296 kW

approx. 40.000

emission


Economical Aspects

• ownership of the CMM/AMM resource has to be clear

• electricity prices below 4 $ct. /kWh do not support feasible projects.

• CO2 credits are a possibility to enhance the economic of projects


Economical Aspects

Governmental support is important

¾ supported designated nation authority (DNA approval, CO2 credit)

¾ preferred access to the grid

¾ higher electricity prices for electricity to CMM/AMM resources

¾ easy and fast approvals of projects

¾ no royalties on CMM / AMM

¾ dedication to save work environment


Contents

Introduction





Conclusion



Conclusion

• electricity from CMM/AMM is the most efficient utilization option for low BTU gas

• CMM/AMM is different from natural gas → sophisticated gas treatment

• governmental support is needed

• CO2 credit might be the tool to avoid and utilize methane emissions from coal mining activities and even enhance the safety of coalmines


Thank you for your interest!

If you have any further question, please do not hesitate to contact me:

Petro Sporer [email protected]

technical and economic potential for use of coal mine and ...nov 15, 2004 · advantage: • easy...

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